Abstract
It has been suggested that adenosine is involved in the renal haemodynamic and tubular abnormalities observed in cirrhosis. Low-dose theophylline is an adenosine antagonist and recent studies have shown that this drug can improve renal blood flow and sodium excretion in cirrhotic patients. Fifteen patients with newly diagnosed cirrhotic ascites were randomized to receive either 100 mg spironolactone daily for 7 days or 250 mg theophylline on days 1, 2, 4 and 6. Baseline clinical and urinary and serum biochemical data were collected and compared following therapy. After 7 days of spironolactone there were increases in urinary sodium excretion (43.5 +/- 15.6 vs. 106.8 +/- 34.7 mmol/day; P < 0.05) and urine volume (769.1 +/- 206.5 vs. 1541.6 +/- 342.6 mL/day; P < 0.05). No changes in the patients' weight, creatinine clearance or serum electrolytes were observed. No change was detected in any of these parameters following theophylline therapy. Adenosine antagonism in the form of low-dose theophylline is less efficacious than spironolactone in the management of cirrhotic ascites.
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